Dear, @aaaa ddd , don't you think this is not the place to report this kind of issue?

If you visit https://bitbucket.org/asomov/snakeyaml and care to read description, you may understand that SnakeYAML has NO direct connection to any of the IDEs used in the wild world of software development.

So, the resolution of this issue is more that correct :)

Why wouldn't you send some support request to IDE publisher or author of the plugin used for YAML editing in IDE you use?